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arccos(sin(pix))=0,6pi la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
                  3*pi
acos(sin(pi*x)) = ----
                   5  
$$\operatorname{acos}{\left(\sin{\left(\pi x \right)} \right)} = \frac{3 \pi}{5}$$
Solución detallada
Tenemos la ecuación
$$\operatorname{acos}{\left(\sin{\left(\pi x \right)} \right)} = \frac{3 \pi}{5}$$
cambiamos
$$\operatorname{acos}{\left(\sin{\left(\pi x \right)} \right)} - \frac{3 \pi}{5} - 1 = 0$$
$$\operatorname{acos}{\left(\sin{\left(\pi x \right)} \right)} - \frac{3 \pi}{5} - 1 = 0$$
Sustituimos
$$w = \operatorname{acos}{\left(\sin{\left(\pi x \right)} \right)}$$
Transportamos los términos libres (sin w)
del miembro izquierdo al derecho, obtenemos:
$$w - \frac{3 \pi}{5} = 1$$
Dividamos ambos miembros de la ecuación en (w - 3*pi/5)/w
w = 1 / ((w - 3*pi/5)/w)

Obtenemos la respuesta: w = 1 + 3*pi/5
hacemos cambio inverso
$$\operatorname{acos}{\left(\sin{\left(\pi x \right)} \right)} = w$$
sustituimos w:
Gráfica
Respuesta rápida [src]
x1 = -1/10
$$x_{1} = - \frac{1}{10}$$
     11
x2 = --
     10
$$x_{2} = \frac{11}{10}$$
x2 = 11/10
Suma y producto de raíces [src]
suma
        11
-1/10 + --
        10
$$- \frac{1}{10} + \frac{11}{10}$$
=
1
$$1$$
producto
 -11 
-----
10*10
$$- \frac{11}{100}$$
=
-11 
----
100 
$$- \frac{11}{100}$$
-11/100
Respuesta numérica [src]
x1 = -12.1
x2 = 89.9
x3 = -48.1
x4 = 1.9
x5 = -26.1
x6 = -38.1
x7 = -90.1
x8 = -68.1
x9 = -56.1
x10 = 71.9
x11 = -100.1
x12 = -16.1
x13 = -4.1
x14 = 29.9
x15 = 51.9
x16 = 33.9
x17 = 53.9
x18 = -30.1
x19 = 83.9
x20 = -36.1
x21 = 99.9
x22 = -70.1
x23 = -84.1
x24 = 7.9
x25 = 85.9
x26 = 23.9
x27 = 45.9
x28 = 5.9
x29 = -60.1
x30 = 17.9
x31 = 35.9
x32 = 63.9
x33 = -40.1
x34 = -8.1
x35 = -74.1
x36 = 15.9
x37 = 59.9
x38 = 9.9
x39 = 13.9
x40 = -76.1
x41 = 65.9
x42 = -28.1
x43 = 43.9
x44 = -86.1
x45 = 55.9
x46 = -24.1
x47 = -46.1
x48 = -66.1
x49 = -92.1
x50 = -64.1
x51 = 91.9
x52 = -20.1
x53 = 25.9
x54 = -78.1
x55 = 21.9
x56 = -42.1
x57 = 57.9
x58 = -34.1
x59 = -62.1
x60 = 41.9
x61 = -80.1
x62 = 37.9
x63 = -58.1
x64 = 69.9
x65 = -44.1
x66 = -0.1
x67 = 31.9
x68 = 47.9
x69 = -82.1
x70 = -10.1
x71 = 67.9
x72 = -88.1
x73 = 77.9
x74 = -54.1
x75 = -18.1
x76 = -50.1
x77 = -6.1
x78 = 11.9
x79 = -98.1
x80 = -52.1
x81 = 79.9
x82 = -2.1
x83 = -32.1
x84 = 95.9
x85 = 97.9
x86 = 87.9
x87 = 39.9
x88 = 19.9
x89 = -94.1
x90 = -72.1
x91 = 73.9
x92 = 93.9
x93 = 3.9
x94 = -22.1
x95 = 49.9
x96 = 75.9
x97 = 81.9
x98 = -14.1
x99 = 27.9
x100 = -96.1
x101 = 61.9
x101 = 61.9